研究目的
Investigating the design, fabrication, optimization, and experimental results of a high-efficiency planar solar thermophotovoltaic (STPV) system utilizing a micro-textured absorber and a nanostructure multi-layer metal-dielectric coated selective emitter.
研究成果
The study demonstrated a high-efficiency planar STPV system with a maximum electrical output power density of 1.71 W/cm2 and an overall power conversion efficiency of 8.4%. The system's performance is the highest reported for any experimental STPV device, with potential for further improvements.
研究不足
The study acknowledges the need for further improvements in suppressing sub-bandgap radiation, using better TPV cells, improving the radiative view factor between the emitter and cells, and reducing reflection loss to enhance system efficiency.
1：Experimental Design and Method Selection:
The study involved the design and fabrication of a planar STPV system with a micro-textured absorber and a nanostructure selective emitter. The methodology included the use of a high-power continuous wave laser diode stack as a simulated source of concentrated incident radiation.
2：Sample Selection and Data Sources:
The absorber and emitter were fabricated on a tungsten (W) substrate. Gallium antimonide (GaSb)-based TPV cells were used in the STPV design.
3：List of Experimental Equipment and Materials:
Equipment included a high-power continuous wave laser diode stack, GaSb-based TPV cells, and a nanostructure selective emitter consisting of silicon nitride (Si3N4) and tungsten (W) layers.
4：Experimental Procedures and Operational Workflow:
The experiment was conducted at different operating temperatures, with the electrical output power density and overall power conversion efficiency measured.
5：Data Analysis Methods:
The performance of the STPV system was analyzed based on the electrical output power density and power conversion efficiency.
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